Immune System
Which of the following proteins would not need localization signal?

A protein bound to the endoplasmic reticulum (ER) membrane
A cell surface protein
A cytosolic protein
A nuclear protein

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Immune System
Which of the following is correct for isoantigens?

They are antigens found in all members of different species
They are antigens found in all members of a species
They are antigens found in some members of different species
They are antigens found in some members of a species

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Immune System
Polymorphonuclear leukocytes (or PMNs)

are derived from bone marrow stem cells
All of these
can be attracted to the site of an infection following activation of complement
are a type of phagocyte that can engulf and kill bacteria

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